/*--------------------------------------------*/
// aes_ecbl.cl
/*--------------------------------------------*/

#define WG_SIZE 256


// Tabular Rijndael exponentiation
__constant unsigned char RCON[256] = {
   0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36,
   };
   // Only 10 values used by AES-128
   /*0x6c, 0xd8, 0xab, 0x4d, 0x9a, 
   0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 
   0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 
   0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 
   0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 
   0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 
   0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 
   0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 
   0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 
   0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 
   0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 
   0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 
   0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 
   0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 
   0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 
   0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d};*/

// Forward  S-BOX 
__constant unsigned char SBOX[256] = {
   0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5, 0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76,
   0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0, 0xAD, 0xD4, 0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0,
   0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC, 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15,
   0x04, 0xC7, 0x23, 0xC3, 0x18, 0x96, 0x05, 0x9A, 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27, 0xB2, 0x75,
   0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0, 0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84,
   0x53, 0xD1, 0x00, 0xED, 0x20, 0xFC, 0xB1, 0x5B, 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58, 0xCF,
   0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85, 0x45, 0xF9, 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8,
   0x51, 0xA3, 0x40, 0x8F, 0x92, 0x9D, 0x38, 0xF5, 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2,
   0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17, 0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19, 0x73,
   0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88, 0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB,
   0xE0, 0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C, 0xC2, 0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79,
   0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E, 0xA9, 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08,
   0xBA, 0x78, 0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6, 0xE8, 0xDD, 0x74, 0x1F, 0x4B, 0xBD, 0x8B, 0x8A,
   0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E, 0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E,
   0xE1, 0xF8, 0x98, 0x11, 0x69, 0xD9, 0x8E, 0x94, 0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55, 0x28, 0xDF,
   0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68, 0x41, 0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16
};


__kernel void aes_ecb(__constant unsigned char *key,
		      __global unsigned char *plaintext, 
		      __global unsigned char *ciphertext,
		      __global unsigned int *gT0,
		      __global unsigned int *gT1,
		      __global unsigned int *gT2,
		      __global unsigned int *gT3,
		      unsigned int offset)
{
  // Get local and global identifiers
  const unsigned int gIdx = get_global_id(0) + offset;
  const unsigned int idx = get_local_id(0);

  __global unsigned int *plainPtr = (__global unsigned int*)plaintext;
  __global unsigned int *cipherPtr = (__global unsigned int*)ciphertext;
  
  //__local unsigned int state[4], tmpState[4];
  unsigned int state[4], tmpState[4];
  __local unsigned int expKeyPtr[44];
   unsigned int tmp;
  
  __local unsigned int T0[256];
  __local unsigned int T1[256];
  __local unsigned int T2[256];
  __local unsigned int T3[256];

  // First workitem of each workgroup compute the expanded key on-the-fly
  if (!idx)
  {
    
    // First 16 bytes are the encryption key
    expKeyPtr[0] = ((__constant unsigned int*)key)[0];
    expKeyPtr[1] = ((__constant unsigned int*)key)[1];
    expKeyPtr[2] = ((__constant unsigned int*)key)[2];
    expKeyPtr[3] = ((__constant unsigned int*)key)[3];


    // Generate the remaining bytes
    for (int i=1,j; i<=10; i++)
    {
      // multiples of 4
      j=i<<2;

      // Get the values of the previous 4 bytes of the expanded key
      tmp = expKeyPtr[j-1];

      // Perform key schedule core on tmp:
      // TODO: 
      // - handle big endian?
      // - join in a single step?
      // 1- rotate
      tmp = (tmp>>8)^(tmp<<24);

      // 2 - apply SBOX
      tmp = (SBOX[tmp>>24]<<24)        ^
	    (SBOX[(tmp>>16)&0xff]<<16) ^
	    (SBOX[(tmp>>8)&0xff]<<8)   ^
	    (SBOX[tmp&0xff]);

      // 3 - perform RCON(i) and xor with the first byte of tmp
      tmp ^= RCON[i];

      // Done with key schedule core


      // Get first 4 bytes of the key expansion by xor-ing tmp with the 4 bytes 16 bytes before
      expKeyPtr[j] = tmp ^ expKeyPtr[j-4];
    
      // Do the same for the remaining 12 bytes of the expanded key
      expKeyPtr[j+1] = expKeyPtr[j]   ^ expKeyPtr[j+1 -4];
      expKeyPtr[j+2] = expKeyPtr[j+1] ^ expKeyPtr[j+2 -4];
      expKeyPtr[j+3] = expKeyPtr[j+2] ^ expKeyPtr[j+3 -4];
    }
    

    /*
    // TODO: WHAT A HELL IS NOT WORKING IN THE UN-ROLLED LOOP?!?
    // Round 1
    // Get the values of the previous 4 bytes of the expanded key
    tmp = expKeyPtr[3];

    // Perform key schedule core on tmp:
    // TODO: 
    // - handle big endian?
    // - join in a single step?
    // 1- rotate
    tmp = (tmp>>8)^(tmp<<24);

    // TODO: join 2 and 3 in a single step
    // 2 - apply SBOX
    tmp = (SBOX[tmp>>24]<<24)        ^
	  (SBOX[(tmp>>16)&0xff]<<16) ^
	  (SBOX[(tmp>>8)&0xff]<<8)   ^
	  (SBOX[tmp&0xff]);

    // 3 - perform RCON(i) and xor with the first byte of tmp
    tmp ^= RCON[1];

    // Done with key schedule core

    // Get first 4 bytes of the key expansion by xor-ing tmp with the 4 bytes 16 bytes before
    expKeyPtr[4] = tmp ^ expKeyPtr[0];
    
    // Do the same for the remaining 12 bytes of the expanded key
    expKeyPtr[5] = expKeyPtr[4] ^ expKeyPtr[1];
    expKeyPtr[6] = expKeyPtr[5] ^ expKeyPtr[2];
    expKeyPtr[7] = expKeyPtr[6] ^ expKeyPtr[3];
    
    // Round 2
    tmp = expKeyPtr[7];

    tmp = (tmp>>8)^(tmp<<24);

    tmp = (SBOX[tmp>>24]<<24)        ^
	  (SBOX[(tmp>>16)&0xff]<<16) ^
	  (SBOX[(tmp>>8)&0xff]<<8)   ^
	  (SBOX[tmp&0xff]);

    tmp ^= RCON[2];

    expKeyPtr[8] = tmp ^ expKeyPtr[4];
    expKeyPtr[9] = expKeyPtr[8]   ^ expKeyPtr[5];
    expKeyPtr[10] = expKeyPtr[9]  ^ expKeyPtr[6];
    expKeyPtr[11] = expKeyPtr[10] ^ expKeyPtr[7];    
    
    // Round 3
    tmp = expKeyPtr[11];

    tmp = (tmp>>8)^(tmp<<24);

    tmp = (SBOX[tmp>>24]<<24)        ^
	  (SBOX[(tmp>>16)&0xff]<<16) ^
	  (SBOX[(tmp>>8)&0xff]<<8)   ^
	  (SBOX[tmp&0xff]);

    tmp ^= RCON[3];

    expKeyPtr[12] = tmp ^ expKeyPtr[8];
    expKeyPtr[13] = expKeyPtr[12]   ^ expKeyPtr[9];
    expKeyPtr[14] = expKeyPtr[13] ^ expKeyPtr[10];
    expKeyPtr[15] = expKeyPtr[14] ^ expKeyPtr[11];
    
    
    // Round 4
    tmp = expKeyPtr[15];

    tmp = (tmp>>8)^(tmp<<24);

    tmp = (SBOX[tmp>>24]<<24)        ^
	  (SBOX[(tmp>>16)&0xff]<<16) ^
	  (SBOX[(tmp>>8)&0xff]<<8)   ^
	  (SBOX[tmp&0xff]);

    tmp ^= RCON[4];

    expKeyPtr[16] = tmp ^ expKeyPtr[12];
    expKeyPtr[17] = expKeyPtr[16] ^ expKeyPtr[13];
    expKeyPtr[18] = expKeyPtr[17] ^ expKeyPtr[14];
    expKeyPtr[19] = expKeyPtr[18] ^ expKeyPtr[15];
    
    
    // Round 5
    tmp = expKeyPtr[19];

    tmp = (tmp>>8)^(tmp<<24);

    tmp = (SBOX[tmp>>24]<<24)        ^
	  (SBOX[(tmp>>16)&0xff]<<16) ^
	  (SBOX[(tmp>>8)&0xff]<<8)   ^
	  (SBOX[tmp&0xff]);

    tmp ^= RCON[5];

    expKeyPtr[20] = tmp ^ expKeyPtr[16];
    expKeyPtr[21] = expKeyPtr[20] ^ expKeyPtr[17];
    expKeyPtr[22] = expKeyPtr[21] ^ expKeyPtr[18];
    expKeyPtr[23] = expKeyPtr[22] ^ expKeyPtr[19];
    
    
    // Round 6
    tmp = expKeyPtr[23];

    tmp = (tmp>>8)^(tmp<<24);

    tmp = (SBOX[tmp>>24]<<24)        ^
	  (SBOX[(tmp>>16)&0xff]<<16) ^
	  (SBOX[(tmp>>8)&0xff]<<8)   ^
	  (SBOX[tmp&0xff]);

    tmp ^= RCON[6];

    expKeyPtr[24] = tmp ^ expKeyPtr[20];
    expKeyPtr[25] = expKeyPtr[24]   ^ expKeyPtr[21];
    expKeyPtr[26] = expKeyPtr[25] ^ expKeyPtr[22];
    expKeyPtr[27] = expKeyPtr[26] ^ expKeyPtr[23];
    
    
    // Round 7
    tmp = expKeyPtr[27];

    tmp = (tmp>>8)^(tmp<<24);

    tmp = (SBOX[tmp>>24]<<24)        ^
	  (SBOX[(tmp>>16)&0xff]<<16) ^
	  (SBOX[(tmp>>8)&0xff]<<8)   ^
	  (SBOX[tmp&0xff]);

    tmp ^= RCON[7];

    expKeyPtr[28] = tmp ^ expKeyPtr[24];
    expKeyPtr[29] = expKeyPtr[28] ^ expKeyPtr[25];
    expKeyPtr[30] = expKeyPtr[29] ^ expKeyPtr[26];
    expKeyPtr[31] = expKeyPtr[30] ^ expKeyPtr[27];
    
    
    // Round 8
    tmp = expKeyPtr[31];

    tmp = (tmp>>8)^(tmp<<24);

    tmp = (SBOX[tmp>>24]<<24)        ^
	  (SBOX[(tmp>>16)&0xff]<<16) ^
	  (SBOX[(tmp>>8)&0xff]<<8)   ^
	  (SBOX[tmp&0xff]);

    tmp ^= RCON[8];

    expKeyPtr[32] = tmp ^ expKeyPtr[28];
    expKeyPtr[33] = expKeyPtr[32]   ^ expKeyPtr[29];
    expKeyPtr[34] = expKeyPtr[33] ^ expKeyPtr[30];
    expKeyPtr[35] = expKeyPtr[34] ^ expKeyPtr[31];
    
    
    // Round 9
    tmp = expKeyPtr[35];

    tmp = (tmp>>8)^(tmp<<24);

    tmp = (SBOX[tmp>>24]<<24)        ^
	  (SBOX[(tmp>>16)&0xff]<<16) ^
	  (SBOX[(tmp>>8)&0xff]<<8)   ^
	  (SBOX[tmp&0xff]);

    tmp ^= RCON[9];

    expKeyPtr[36] = tmp ^ expKeyPtr[32];
    expKeyPtr[37] = expKeyPtr[36] ^ expKeyPtr[33];
    expKeyPtr[38] = expKeyPtr[37] ^ expKeyPtr[34];
    expKeyPtr[39] = expKeyPtr[38] ^ expKeyPtr[35];
    
    
    // Round 10
    tmp = expKeyPtr[39];

    tmp = (tmp>>8)^(tmp<<24);

    tmp = (SBOX[tmp>>24]<<24)        ^
	  (SBOX[(tmp>>16)&0xff]<<16) ^
	  (SBOX[(tmp>>8)&0xff]<<8)   ^
	  (SBOX[tmp&0xff]);

    tmp ^= RCON[10];

    expKeyPtr[40] = tmp ^ expKeyPtr[36];
    expKeyPtr[41] = expKeyPtr[40] ^ expKeyPtr[37];
    expKeyPtr[42] = expKeyPtr[41] ^ expKeyPtr[38];
    expKeyPtr[43] = expKeyPtr[42] ^ expKeyPtr[39];
    */
    
    // Done with key scheduling
  }
  

  // Each thread in a work group copy one entry of each T-table inside shared memory.
  // That means that at least 256 work items per-workgroup must be launched. This also
  // implies a min file size of 4KB
  // TODO: generalize to arbitrary file size - work group size?
  // TODO: handle cases were file size is not a multiple of 256, that is, there could be
  // workgroups with size less than 256
  if (idx<WG_SIZE)
  {
    T0[idx] = gT0[idx];
    T1[idx] = gT1[idx];
    T2[idx] = gT2[idx];
    T3[idx] = gT3[idx];
  }

  barrier(CLK_LOCAL_MEM_FENCE);


  // TODO: async copy to local memory during key scheduling
  // Get single plaintext 128-bit block to encrypt
  state[0] = plainPtr[gIdx<<2];
  state[1] = plainPtr[1 + (gIdx<<2)];
  state[2] = plainPtr[2 + (gIdx<<2)];
  state[3] = plainPtr[3 + (gIdx<<2)];

  
  //----------------------------------------------------------------/
  // II - Perform initial round                                     /
  //----------------------------------------------------------------/
  // AddRoundKey: combine each byte of the block with the bytes of the
  // first round key using an XOR operation
  state[0] ^= expKeyPtr[0];
  state[1] ^= expKeyPtr[1];
  state[2] ^= expKeyPtr[2];
  state[3] ^= expKeyPtr[3];

  
  //----------------------------------------------------------------/
  //  III - Perform middle rounds                                   /
  //----------------------------------------------------------------/
  // Round 1
  tmpState[0]= T0[(state[0]&0xff)] ^
               T1[(state[1]>>8)&0xff] ^
               T2[(state[2]>>16)&0xff] ^
               T3[(state[3])>>24] ^ expKeyPtr[4];
  tmpState[1]= T0[(state[1]&0xff)] ^
               T1[(state[2]>>8)&0xff] ^
               T2[(state[3]>>16)&0xff] ^
               T3[(state[0])>>24] ^ expKeyPtr[5];
  tmpState[2]= T0[(state[2]&0xff)] ^
               T1[(state[3]>>8)&0xff] ^
               T2[(state[0]>>16)&0xff] ^
               T3[(state[1])>>24] ^ expKeyPtr[6];
  tmpState[3]= T0[(state[3]&0xff)] ^
               T1[(state[0]>>8)&0xff] ^
               T2[(state[1]>>16)&0xff] ^
               T3[(state[2])>>24] ^ expKeyPtr[7];
  
  // Round 2
  state[0]= T0[(tmpState[0]&0xff)] ^
            T1[(tmpState[1]>>8)&0xff] ^
            T2[(tmpState[2]>>16)&0xff] ^
            T3[(tmpState[3])>>24] ^ expKeyPtr[8];
  state[1]= T0[(tmpState[1]&0xff)] ^
            T1[(tmpState[2]>>8)&0xff] ^
            T2[(tmpState[3]>>16)&0xff] ^
            T3[(tmpState[0])>>24] ^ expKeyPtr[9];
  state[2]= T0[(tmpState[2]&0xff)] ^
            T1[(tmpState[3]>>8)&0xff] ^
            T2[(tmpState[0]>>16)&0xff] ^
            T3[(tmpState[1])>>24] ^ expKeyPtr[10];
  state[3]= T0[(tmpState[3]&0xff)] ^
            T1[(tmpState[0]>>8)&0xff] ^
            T2[(tmpState[1]>>16)&0xff] ^
            T3[(tmpState[2])>>24] ^ expKeyPtr[11];
  
  // Round 3
  tmpState[0]= T0[(state[0]&0xff)] ^
               T1[(state[1]>>8)&0xff] ^
               T2[(state[2]>>16)&0xff] ^
               T3[(state[3])>>24] ^ expKeyPtr[12];
  tmpState[1]= T0[(state[1]&0xff)] ^
               T1[(state[2]>>8)&0xff] ^
               T2[(state[3]>>16)&0xff] ^
               T3[(state[0])>>24] ^ expKeyPtr[13];
  tmpState[2]= T0[(state[2]&0xff)] ^
               T1[(state[3]>>8)&0xff] ^
               T2[(state[0]>>16)&0xff] ^
               T3[(state[1])>>24] ^ expKeyPtr[14];
  tmpState[3]= T0[(state[3]&0xff)] ^
               T1[(state[0]>>8)&0xff] ^
               T2[(state[1]>>16)&0xff] ^
               T3[(state[2])>>24] ^ expKeyPtr[15];

  // Round 4
  state[0]= T0[(tmpState[0]&0xff)] ^
            T1[(tmpState[1]>>8)&0xff] ^
            T2[(tmpState[2]>>16)&0xff] ^
            T3[(tmpState[3])>>24] ^ expKeyPtr[16];
  state[1]= T0[(tmpState[1]&0xff)] ^
            T1[(tmpState[2]>>8)&0xff] ^
            T2[(tmpState[3]>>16)&0xff] ^
            T3[(tmpState[0])>>24] ^ expKeyPtr[17];
  state[2]= T0[(tmpState[2]&0xff)] ^
            T1[(tmpState[3]>>8)&0xff] ^
            T2[(tmpState[0]>>16)&0xff] ^
            T3[(tmpState[1])>>24] ^ expKeyPtr[18];
  state[3]= T0[(tmpState[3]&0xff)] ^
            T1[(tmpState[0]>>8)&0xff] ^
            T2[(tmpState[1]>>16)&0xff] ^
            T3[(tmpState[2])>>24] ^ expKeyPtr[19];

  // Round 5
  tmpState[0]= T0[(state[0]&0xff)] ^
               T1[(state[1]>>8)&0xff] ^
               T2[(state[2]>>16)&0xff] ^
               T3[(state[3])>>24] ^ expKeyPtr[20];
  tmpState[1]= T0[(state[1]&0xff)] ^
               T1[(state[2]>>8)&0xff] ^
               T2[(state[3]>>16)&0xff] ^
               T3[(state[0])>>24] ^ expKeyPtr[21];
  tmpState[2]= T0[(state[2]&0xff)] ^
               T1[(state[3]>>8)&0xff] ^
               T2[(state[0]>>16)&0xff] ^
               T3[(state[1])>>24] ^ expKeyPtr[22];
  tmpState[3]= T0[(state[3]&0xff)] ^
               T1[(state[0]>>8)&0xff] ^
               T2[(state[1]>>16)&0xff] ^
               T3[(state[2])>>24] ^ expKeyPtr[23];

  // Round 6
  state[0]= T0[(tmpState[0]&0xff)] ^
            T1[(tmpState[1]>>8)&0xff] ^
            T2[(tmpState[2]>>16)&0xff] ^
            T3[(tmpState[3])>>24] ^ expKeyPtr[24];
  state[1]= T0[(tmpState[1]&0xff)] ^
            T1[(tmpState[2]>>8)&0xff] ^
            T2[(tmpState[3]>>16)&0xff] ^
            T3[(tmpState[0])>>24] ^ expKeyPtr[25];
  state[2]= T0[(tmpState[2]&0xff)] ^
            T1[(tmpState[3]>>8)&0xff] ^
            T2[(tmpState[0]>>16)&0xff] ^
            T3[(tmpState[1])>>24] ^ expKeyPtr[26];
  state[3]= T0[(tmpState[3]&0xff)] ^
            T1[(tmpState[0]>>8)&0xff] ^
            T2[(tmpState[1]>>16)&0xff] ^
            T3[(tmpState[2])>>24] ^ expKeyPtr[27];

  // Round 7
  tmpState[0]= T0[(state[0]&0xff)] ^
               T1[(state[1]>>8)&0xff] ^
               T2[(state[2]>>16)&0xff] ^
               T3[(state[3])>>24] ^ expKeyPtr[28];
  tmpState[1]= T0[(state[1]&0xff)] ^
               T1[(state[2]>>8)&0xff] ^
               T2[(state[3]>>16)&0xff] ^
               T3[(state[0])>>24] ^ expKeyPtr[29];
  tmpState[2]= T0[(state[2]&0xff)] ^
               T1[(state[3]>>8)&0xff] ^
               T2[(state[0]>>16)&0xff] ^
               T3[(state[1])>>24] ^ expKeyPtr[30];
  tmpState[3]= T0[(state[3]&0xff)] ^
               T1[(state[0]>>8)&0xff] ^
               T2[(state[1]>>16)&0xff] ^
               T3[(state[2])>>24] ^ expKeyPtr[31];

  // Round 8
  state[0]= T0[(tmpState[0]&0xff)] ^
            T1[(tmpState[1]>>8)&0xff] ^
            T2[(tmpState[2]>>16)&0xff] ^
            T3[(tmpState[3])>>24] ^ expKeyPtr[32];
  state[1]= T0[(tmpState[1]&0xff)] ^
            T1[(tmpState[2]>>8)&0xff] ^
            T2[(tmpState[3]>>16)&0xff] ^
            T3[(tmpState[0])>>24] ^ expKeyPtr[33];
  state[2]= T0[(tmpState[2]&0xff)] ^
            T1[(tmpState[3]>>8)&0xff] ^
            T2[(tmpState[0]>>16)&0xff] ^
            T3[(tmpState[1])>>24] ^ expKeyPtr[34];
  state[3]= T0[(tmpState[3]&0xff)] ^
            T1[(tmpState[0]>>8)&0xff] ^
            T2[(tmpState[1]>>16)&0xff] ^
            T3[(tmpState[2])>>24] ^ expKeyPtr[35];
  

  // Round 9
  tmpState[0]= T0[(state[0]&0xff)] ^
               T1[(state[1]>>8)&0xff] ^
               T2[(state[2]>>16)&0xff] ^
               T3[(state[3])>>24] ^ expKeyPtr[36];
  tmpState[1]= T0[(state[1]&0xff)] ^
               T1[(state[2]>>8)&0xff] ^
               T2[(state[3]>>16)&0xff] ^
               T3[(state[0])>>24] ^ expKeyPtr[37];
  tmpState[2]= T0[(state[2]&0xff)] ^
               T1[(state[3]>>8)&0xff] ^
               T2[(state[0]>>16)&0xff] ^
               T3[(state[1])>>24] ^ expKeyPtr[38];
  tmpState[3]= T0[(state[3]&0xff)] ^
               T1[(state[0]>>8)&0xff] ^
               T2[(state[1]>>16)&0xff] ^
               T3[(state[2])>>24] ^ expKeyPtr[39];
  

  //----------------------------------------------------------------/
  //  III - Perform final round                                     /
  //----------------------------------------------------------------/
  state[0]= (T2[(tmpState[0]&0xff)] &0x000000ff) ^ 
            (T3[(tmpState[1]>>8)&0xff] &0x0000ff00) ^
            (T0[(tmpState[2]>>16)&0xff] &0x00ff0000) ^
            (T1[(tmpState[3])>>24] &0xff000000) ^ expKeyPtr[40];
  state[1]= (T2[(tmpState[1]&0xff)] &0x000000ff) ^
            (T3[(tmpState[2]>>8)&0xff] &0x0000ff00) ^
            (T0[(tmpState[3]>>16)&0xff] &0x00ff0000) ^
            (T1[(tmpState[0])>>24] &0xff000000) ^ expKeyPtr[41];
  state[2]= (T2[(tmpState[2]&0xff)] &0x000000ff) ^
            (T3[(tmpState[3]>>8)&0xff] &0x0000ff00) ^
            (T0[(tmpState[0]>>16)&0xff] &0x00ff0000) ^
            (T1[(tmpState[1])>>24] &0xff000000) ^ expKeyPtr[42];
  state[3]= (T2[(tmpState[3]&0xff)] &0x000000ff) ^
            (T3[(tmpState[0]>>8)&0xff] &0x0000ff00) ^
            (T0[(tmpState[1]>>16)&0xff] &0x00ff0000) ^
            (T1[(tmpState[2])>>24] &0xff000000) ^ expKeyPtr[43];

  // DONE WITH ENCRYPTION

  
  // Copy state back to global memory
  cipherPtr[gIdx<<2] = state[0];
  cipherPtr[1 + (gIdx<<2)] = state[1];
  cipherPtr[2 + (gIdx<<2)] = state[2];
  cipherPtr[3 + (gIdx<<2)] = state[3];
  
}
